Here are the project pages with all the information about what GNOME's Google Summer of Code students are working on in summer 2013.
Porting GTG and Liblarch to Gtk3 and Python3 (Xuan Hu) (abstract)
Complete redesign of GNOME Shell's app picker (Carlos Soriano) (abstract)
Implement Caret and Focus Tracking for GNOME Shell (Magdalen Berns) (abstract)
GtkSourceView: add regex search and modernize existing features (Sébastien Wilmet) (abstract)
A Web Application for Getting Things Gnome! (Parin Porecha) (abstract)
Break Timer application for GNOME 3 (Dylan McCall) (abstract)
PDF Annotation Enhancements in Evince (Gökcen Eraslan) (abstract)
Redesign and port Gtranslator to Vala (Marcos Chavarría Teijeiro) (abstract)
Implementing support for custom functions in GNOME Calculator (Garima Joshi) (abstract)
Dual screen capable presentation in gnome-documents (Alessandro Campagni) (abstract)
Improve gnome-clocks world view: pictures, geolocation (Evgeny Bobkin) (abstract)
Support for Wayland in WebKit2GTK+ (Žan Doberšek) (abstract)
RAW developer integration for the F-spot photo manager (Camilo Polymeris) (abstract)
Banshee: Integrate with more REST API Services (SongKick and FanArt.TV) (Tomasz Maczyński) (abstract)
Implement a new avatar picker dialog that will pull from online sources (Bogdan Ciobanu ) (abstract)
Port Color Management from Gnome to Wayland (Rafael Santos) (Abstract)
Implementing Advanced Git Operations in GitG (Sindhu S) (abstract)
Google Tasks support to libgdata and Evolution (Pēteris Krišjānis) (abstract)
Implementation of GNOME Music (Sai Suman Prayaga) (abstract)
Activity Development for GCompris Suite (Lavanya Gunasekaran) (abstract)
Overhaul the Date & Time panel in System Settings (Kalev Lember) (abstract)
Add Bookshelf View & Tiling support to Evince (Aakash Goenka) (abstract)
GObject Introspection for java-gnome (Guillaume Mazoyer) (abstract)
Copy the starred line below and use this template to add a link to your project page. Then go to https://wiki.gnome.org/action/edit/SummerOfCode2013/Projects/FirstNameLastName_ShortProjectName (substituting the last part with any short project name you chose), and start editing it.
Full Project Name (FirstName LastName) (abstract)